1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 06 11 N-STATUS Replaced by WSK-M4D725-A A. Pan, APA 2005 02 17 Revised Inserted 3.0; Deleted 3.4, 3.5 & 4 1978 12 07 Released AJ1-6000-153 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 1 of 3 POLYBUTYL
2、ENE TEREPHTHALATE, 30% GLASS FILLED - ESB-M4D354-A1 EXTERIOR PAINTABLE NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a glass fiber reinforced polybutylene terephthalate resin with high heat resistance, good dimensional stability, high flexural properties, and g
3、ood electrical resistance suitable for exterior or paintable applications. 2. APPLICATION This specification was released originally for material used for exterior body color painted headlamp housings. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part pro
4、ducers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1 VIRGIN MOLDING COMPOUND 3.1.1 Flow Rate, max 20 g/10 min (ASTM D 1238, Condition “T“) 3.1.2 Glass Fiber Content, by weight 28 - 32% (1 h at 649 C) 3.2 MOLDED TEST SPECIMEN 3.2.1 Specific Gravity,
5、 max 1.58 (ASTM D 792) 3.2.2 Tensile Strength, min 103 MPa (ASTM D 638) Elongation, min 3.0% 3.2.3 Flexural Strength, min 159 MPa (ASTM D 790) 3.2.4 Flexural Modulus, min 6.2 GPa (ASTM D 790) 3.2.5 Impact Strength, Izod, min (ASTM D 256) 3.2.5.1 Notched 80 J/m 3.2.5.2 Unnotched 534 J/m ENGINEERING M
6、ATERIAL SPECIFICATIONESB-M4D354-A1Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 3 3.2.6 Deflection Temperature, min (ASTM D 648) At 0.45 MPa 199 C At 1.82 MPa 193 C 3.2.7 Water Absorption, max 0.10% (ASTM D 570, 24 h immersion) 3.2.8 Dielectric Strength, min
7、 19 kV/mm (ASTM D 149, short time) 3.2.9 Flammability, max 100 mm/min (FLTM BN 024-02, without the lot sampling plan) In addition, the test specimen shall not exhibit any flashing or sudden flaming on either surface in excess of the above maximum value. 3.3 MOLDED PART 3.3.1 Color Natural, or as spe
8、cified on the engineering drawing. 3.3.2 Specific Gravity, max 1.58 (ASTM D 792) 3.3.3 Glass Fiber Content, by weight 28 - 32% (1 h at 649 C) 3.3.4 Decorability Parts fabricated from this material requiring a decorative coating (paint, hot stamp, etc.) must meet the engineering performance specifica
9、tion requirements shown on the drawing using coating materials approved by the responsible product engineering office. 3.3.5 Physical Properties Specific requirements for physical properties of molded parts, when required, shall be specified on the engineering drawing. All critical areas with respec
10、t to these properties shall be clearly designated on the engineering drawing. 3.3.6 Molding Quality The molded part shall be free of porosity and voids. 3.3.7 Heat Resistance No visual evidence of shrinkage or distortion, including gate areas, shall be evident on the molded part. The part shall not
11、warp to the extent that fit with mating parts in ultimate assembly is affected. Test Method: Condition unassembled parts in a mechanical convection oven for 3 h at 143 C (unless otherwise specified on the engineering drawing). ENGINEERING MATERIAL SPECIFICATIONESB-M4D354-A1Printed copies are uncontr
12、olled Copyright 2010, Ford Global Technologies, LLC Page 3 of 3 3.3.8 Special Requirements for Unpainted Surfaces Exposed to Exterior Weathering: Note: These requirements may be waived if all areas of the finished parts exposed to exterior weathering are painted and any unpainted substrate is nonvis
13、ible when in vehicle position. 3.3.8.1 Color Stability After polishing a 4 rating minimum per AATCC Gray Scale for Evaluating Change in Color after 1600 h weatherometer exposure per FLTM BO 101-01 and also after 1 year Florida exposure, 5 south, direct weathering inland. 3.3.9 Flow Rate, max Two tim
14、es the actual value obtained (ASTM D 1238, Condition “T“) for virgin material from the same batch from which the part was molded. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 MOLD SHRINKAGE 0.002 - 0.007 (ASTM D 955) 5.2 COEFFICIENT OF LINEAR THERMAL EXPANSION 6.3 x 10-5/C (ASTM D 696) 5.3 COMPRESSIVE STRENGTH 110 MPa (ASTM D 695)
